TY - CHAP A1 - Griesche, Axel A1 - Große, M. A1 - Schillinger, B. A2 - Fritzsche, H. A2 - Huot, J. A2 - Fruchart, D. T1 - Neutron imaging T2 - Neutron Scattering and Other Nuclear Techniques for Hydrogen in Materials N2 - Neutron imaging methods are appropriate to investigate hydrogen distributions in several metallic systems. The large total neutron cross section of hydrogen compared to those of elements or isotopes, respectively, in usual structural materials like steels or zirconium alloys allows the detection even of small amounts of hydrogen in such materials. The dependence of the total macroscopic neutron cross section of the sample or component on the hydrogen concentration can be determined experimentally by means of calibration specimens with known hydrogen concentrations. Such a calibration allows for a full quantitative determination of the local hydrogen concentration with a spatial resolution better than 20 μm. Because neutron radiography is fast and non-destructive, in situ investigations of time-dependent processes like hydrogen absorption and release or hydrogen bulk diffusion can be performed. This chapter gives an introduction into the main neutron imaging methods, radiography and tomography, and gives as examples results of neutron imaging investigations of hydrogen in different steels and in zirconium alloys,respectively. PB - Springer Nature CY - Zurich, Switzerland KW - Neutron imaging KW - Neutron radiography KW - Hydrogen PY - 2016 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/36365 AN - OPUS4-36365 SN - 978-3-319-22792-4 SN - 978-3-319-22791-7 SN - 1868-0380 SN - 1868-0372 SP - Chapter 7, 193 EP - 225 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany